Calle was stripped of her medal in the women's point race at last year's Athens Olympics after the IOC executive board said she tested positive for heptaminol, a banned stimulant.

The IOC disqualified Calle when it found the prohibited stimulant in a urine sample taken after the race. However, the Switzerland-based Court of Arbitration for Sport upheld the Colombian's appeal last week, ruling the headache medicine she took did not contain banned substances.

On Thursday, the IOC ratified the Court's ruling to reinstate Calle's bronze medal.

Calle's medal had been awarded to American cyclist Erin Mirabella, the original fourth-place finisher. Mirabella said Wednesday she is prepared to return it.

"I still feel like I need some time to absorb everything and get a better understanding of the decision," Mirabella said. "But if the IOC asks, it's only fair to give the medal back."

When her medal was revoked, Calle said she was unaware she used an illegal substance, claiming to have taken an anti-migraine pill called Neo-Saldina a few hours before the race.

According to the CAS, Neo-Saldina contains isometheptene, a substance that transforms into heptaminol during laboratory analyses, hence Calle's positive test. The court said isometheptene was not on the list of banned substances for Athens.